Gas burner



y 2, 1933. P. M. FORSTER 1,906,257

GAS BURNER Filed Oct. 22, 1950 /6 INV NTOR.

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ATTORNEYS.

Fatented May 2, 1933 PATENT PERCY M. ronsrnn, or ignnxnpny oap rrogt yra GAS Butane-R Application filed October 22, 1930. Serial -30. $99,479.

This invention relates to gas burners or torches and particularly pertains to a burner nozzle therefor.

It is the principal object of the present invention to provide a generally improved tip or nozzle for gas burners or torches which is so constructed that the gaseous mixture may be ejected at high velocity but which will maintain the velocity of propagation of the flame greater than the velocity of the mixture so that a flame of intense heat will be created which cannot be easily blown out.

In carrying the invention into practice, the gas burner includes a nozzle having a re- 5 stricted orifice and a pair of ports which may be opened and closed. The ports are opened when it is desired to use the burner in order to reduce the gas velocity until the flame becomes of a temperature that its velocity of propagation will exceed the velocity of the gas through the orifice. When the latter condition exists, the ports are closed 2 and a flame of intense heat will emanate from the orifice.

One form which the invention may assume is exemplified in the following description and illustrated by way of example in the accompanying drawing, in which:

Fig. 1 is a perspective view of a burner fitted with a nozzle embodying the preferred form of my invention.

Fig. 2 is a central longitudinal section through the burner and nozzle.

Fig. 3 is a vertical section through the burner taken on line III-III of Fig. 2.

Fig. 4 is a perspective View of the various parts of the nozzle shown in disassembled condition.

Referring more particularly to the accompanying drawing, 10 indicates a burner or torch utilizing natural gas as a fuel basis. This burner or torch includes a casing into which natural gas and air under pressure are delivered through separate tubes 11 and 12. The flow of the gas into the casing is con teehe l r a ju tabl h ee eyeilr e i lh lh b rn r nozz 15 tsrre ided w i h is emented is h ea i g t ree- 1 t e medfhm es 2 t e 1. vOne end 1 f 'hI- tube extends coaxi ally through one end of 'the 50 easi g 1 0 e pe h'f ert ef the O p s t e d a th a ng e m le ly own s i 2.

It W l h n t ee lt et th a r and a a e delivered to e Peiat W ihth eas ng at h nd th reo epi e t 'th en e h meme 5.5 whi h xt nd Within the sina r t x the flew .ef h thr l ga a e is s si o ev s va t-te ente ing th ih hete e e te ih the tub 1.6 to? eli r 0 h no zle Thi i u s m xture a t sh a d se so so hat pr pe em shen wi ta e p ace a th rt e h fe t is .de e ih d end eleimed in my e nea hle ei plieet h e leel lereh fi N vemhefl 929, serial numbe $09,8 7. h eh, ha re lted in Pet a5 eh #15 2572, is d Net mbe .2 39.-

The b n r .ne zl omprises e up 1 ha ing e tau 1 Op n n term d e ly in it tiem by .me i wh it i hreaded on t he ut r e d 9f t u .6.- T 1 9 2.0 1-7 formed with an interior 81101 16891 interme ia e its en ur a h h a perf r t d baflie plate 18 is secured. This baflle plate is 501' the purp e e i su ing t re lghm W e th a r and aespassina b t t p- The upper end of the cup 17 is exteriorly r aded t0 receiv rhste-eehi al p 19 Whieh i arm d w th e r s r t d erifi e29 which communicates at its inner end with an enlarg d eeai l h eemmuni t hs so with the interior of the cup In rmedi t h tip 19 and th bath Pla e h up i termed h taw ld emetr ah y eppe e'd ei eel r p t 21- A sl el v .22 is'r t bly jme ted en th s 'e er of the cup and collared position by th e lower e d o h ti e 1sn ste ier a nu ar sh h en the sp l Thi s e e a ye 22 is fo m w P-Q S 3 whi h ar ad pt d, to be placed into and out of register 3;)

ports 21 in the cup 17 upon rotation of the sleeve valve.

In operation of the burner, the sleeve valve is positioned with the ports 21 and 23 in register and the gas and air are then delivered to the casing and the mixture emanating from the orifice 20 is ignited. The flame will, of course, emanate through the ports and through the orifice. The air supply is then increased until the orifice flame blows out. This blowing out ofthe flame is due to the fact that the flame is of low temperature and its velocity of propagation is not greater than the velocity of the mixture passing through the orifice. Thus, by leaving the ports open the velocity of the mixture emanating through the ports is reduced to less than the velocity of propagation of the flame. This enables maintenance of the flame until the temperature of the latter comes within the critical condition for continuous burning through the orifice. When this stage is reached, the sleeve valve is rotated to place the ports 23 out of register with the ports 21 and the flame will emanate through the orifice 20. As the flame will have at this time reached a temperature where the velocityof propagation is greater than the velocity of the mixture through the orifice, a constant intense flame will emanate from the orifice. Due to the relative velocities, the flame cannot be easily blown out.

By adjusting the gas flow relative to the air flow, a flame of maximum temperature is obtained. Therefore, the air is first adjusted to obtain proper velocity at the tip and thereafter the gas is regulated to obtain a flame of maximum temperature.

From the foregoing it is obvious that I have provided a gas burner nozzle by means of which a flame of high temperature can be obtained from the use of natural gas and while I have shown the preferred form of my invention, it is to be understood that various changes maybe made in its construction by those skilled in the art without departing from the spirit of the invention as de fined in the appended claims. I

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1'. A gas burner of the character described comprising a hollow burner head, an inlet for combustible gas at one end thereof, a restricted burner orifice at the opposite end thereof, said burner head having ports intermediate its ends, means for closing said ports,- and a flame bafli-e in the burner head between said ports and the gas inlet, said ports being positioned relatively close to said burner orifice whereby closing of said ports when gas escaping through them is burning will result in the flame therefrom igniting gas escaping through the burner orifice.

gas escaping 

